Yt-dlp usually rips the best quality possible from the source. Going to a private tracker won’t magically make quality better than where the artist posted their music. Or do you think yt-dlp only works on YouTube? (You would be wrong about that as well)
Yt-dlp takes urls as an input, not libraries. It can rip from SoundCloud, Bandcamp, etc. Often places where small artists are uploading in the highest quality.